was incredible danger landing the helicopter at the bottom of the valley and that they would have to climb to the top of the valley to get to this compound where they knew the bad guy was surrounded by some of the best mercenaries, so to speak, in the world, these really trained mercenaries who had been fighting the soviets and, for, you know, for that ten years during the 1980s, they still went, and they still went to carry out this mission. and i think, kevin, you can describe a little bit about what happened once they landed. >> okay. so they take off from a base on the border, jalalabad, and they fly into this valley. and there's some concern at this point about the plane. there's a certain window that they had that they could get in and out before the cloud cover came, so they had to work quickly as well before they get stuck. but if you could imagine landing in a helicopter, and, you know, the plan was to land the helicopter and get out.